Improvement in apparatus for evaporating liquids



N. PETERS, FHOTUUTNOGRAFHER. WASHINGTON D C illt @Wire 'tta-tied tate Laim Patent No. 103,602, (zaad May 31, 1870.

IMPRQVEMENT IN APPARATS FOR EVAPORATIN G- LIQUIDS.

Mrs-

The Schedule referred to in these Letters Patent and making part of 'che saine.

To all whom it may concern Be it known that I, Graoueu ll. GRAY, of Brook# lyn, inr the county of Kingsand State of New York, have invented a new and improved Evaporator; and Ido hereby declaretbat the following is a full,- clear, and exact description of the saine, reference being had to the accompanying drawing forming a part of this specification, in which- Figure l is a sectional elevation, and

Figure 2 is ahorizoutal section.

This invention relates especially to a process of preparing au extract of tannin bythe evaporation of the liquid infusion of the same, but it is applicable to any process of which evaporation forms an essential part.

The invention consists iu veutilating the evaporating-chamber by means of orifices made in the chimney or smoke-stack, through which pass the products of the combustion by which the heat requisite. to the process of evaporation is generated.

The invention also consists in an apparatus by which the liquor to be evaporated is drawn by a pumpv from the pan containing it, poured out over a horizontal plate, and allowed to fall into the pan again through perfor-ations in such plate, while, at the same time, the hot air or steam employed to leffect evapooration is made to pass through a vertical perforated plat-e, andtraverse in jets through the shower of fallingliquor, to the end that evaporation may more perfectly take place, owing to the intimate commiugiing `of the particles of liquor and air or steam.

1n the drawing- A is the case, inclosiug the whole apparatus.

a, the pan that receives the liquor.

l), a horizontal partition across the oase A, on which the pan a rests.

c, a vertical partition, forming, with the partition nl), the evaporating-chamber B.

' C, the heating-chamber. y

(I, the furnace within the beating-chamber.

e, the chimney, passing up through both the hea-ting and evaporating-chambers.

h h, orifices made in the side of the chimney, and opening into the evaporating-chamber.

The products of combustion from the furnace escaping upward tlnough the chimney create a strong -draught therein, by which'the vapors generated-in the evaporating-chamber are eectually removed.

Heretofore, one of the principal difflcult-ies attending the use of evaporators has been to thoroughly carry off the vapor. I claim that I have overcome this ditiiculty by the means described.

The air heated by the furnace l rises into the space- D, between the partition c and the side of the case, and passes in currents through the perforations fi 0 in said partition.

A pump is employed to-draw the liquor from the pan a, through the tubes L, anddischarges it into the chamber E,in the upper corner ofthe case A; hence, the liquorills in streams through the perfor-ations l in the bottom of the chamber E, back into the pan d, passing through the air-currents as it falls.

Superheated steam may be employed, instead of hot air.

A stirring-wheel, m, may be placed in the'pan, for thc purpose of drawing up out of the same the liquor therein contained, and exposing it to the action ofthe heated currents of air or steam.

When the wheel is used, the liquor is not pumped up int-o the chamber E and allowed to fall in streams, as before deseribed,that process being a substitute for the one in which the wheel is employed..

.Having thus described my invention,

What I claim as new, and desire to secure by Letters Patent, is-

1. The orifices 71, lnade in chimney e, within the evaporating-chamber B, for the purpose of Ventilating the latter, by means of the draught created in the chimney by the products of combustion from the furnace, substantially as described.

2. The combination of the perforated partition c,

chamber E, provided with a perforated bottom, evap-l orating-chamber B, and tubes lf, heating-chamber C, all combined'and arranged substantially as and for the purpose set forth.

. GEO. F. GRAY. Witnesses:

VICTOR HAGMANN,

N. O. PLATT. 

